I could make 50 mods for Bz2 and it would not be enough...
I am currently considering which of 3 different mods I will start right after I finish FS2.
My options are currently:
- QF2: Fractured Destiny
- Fleshstorm 3: The Awakening
- Unnamed total conversion which will be primarily an FPS shooter based in an apocalyptic future on Earth.
I am planning to make all 3 before I retire in 2030.

That doesn't even include the MAD mod which I am quite enthusiastic about potentially making. There are tonnes of features of this game which I really like.